I'm told the reason for the Batman Vs. Superman delay is because of the Justice League and not because of the reported injury to Ben Affleck. The injury to Affleck isn't so bad that they would have to delay the movie to 2016. The reason they are taking the extra time is - as we previously told you - the final 15-20 minutes of Batman Vs. Superman is set to have every major hero, and they are STILL in the casting process and need time for that as well.

Every casting decision is considered major as the person chosen will be that character for multiple movies/appearances.

The source also said that Jason Momoa will not be Aquaman, but is a contender for Martian Manhunter. You will note that Jason Momoa is said to still be in negotiations by The Hollywood Reporter in their own report of the Batman Vs. Superman release delay.

Regarding Aquaman, Comic Book Movie has it correct that Josh Holloway is the current favorite for the role.